Stifel reiterates Onto Innovation stock rating ahead of earnings

Stifel kept a Buy rating on Onto Innovation and reiterated a $350 price target ahead of the May 5 earnings report, versus the current $292.92 share price. The firm expects second-half revenue to rise in the low double-digits sequentially and 40% to 50% year over year, supported by advanced nodes and Dragonfly G5 advanced packaging momentum. Recent developments, including the 27% stake purchase in Rigaku for about $710 million and higher guidance after Dragonfly G5 qualification, reinforce a constructive outlook.

Analysis

ONTO remains a high-quality beneficiary of the AI/foundry capex cycle, but the market is increasingly paying for the optionality rather than the current fundamentals. The key second-order effect is that advanced packaging is shifting from a niche accelerator to a gating item in heterogeneous integration; that makes metrology/inspection vendors more resilient than broader wafer-fab equipment peers when node spending gets lumpy. If Dragonfly G5 ramps cleanly, the mix shift should improve gross margin and make revenue less cyclical because package-level qualification cycles tend to be stickier than single-tool demand.

The Rigaku stake is strategically important because it broadens ONTO’s exposure to X-ray process control at a time when customers are pushing tighter defect detection budgets into advanced nodes and 2.5D/3D packaging. That said, the market may be underestimating integration risk: minority strategic ownership can create partnership value, but it can also distract management and delay capital return if cross-selling or product roadmaps slip. The real upside case is not just a strong print next week; it is a multi-quarter re-rating if the company proves its portfolio can win share at both leading-edge logic and memory packaging customers simultaneously.

Contrarian view: the stock may already discount a near-perfect execution path through 2025, so any sequencing issue in second-half revenue or customer digestion could trigger a sharp de-rate even if the long-term thesis remains intact. The main failure mode is not demand collapse, but timing slippage — advanced packaging shipments, foundry qualification cadence, or customer capex pauses could all push growth into 2026 and compress multiple. In that sense, the setup favors owning ONTO on pullbacks rather than chasing pre-earnings strength; implied volatility is likely too cheap if the company hints at any delay in the June shipment or second-half ramp.

Key Decisions for Investors

• Hold a core long ONTO into earnings only if sized as a tactical momentum position, not a full fundamental overweight; target a 6-12 month horizon and trim into any post-print gap-up greater than 8-10% because the multiple is already extended.
• Buy ONTO on post-earnings weakness if management reaffirms the second-half ramp; risk/reward improves materially on a 5-8% pullback, with a 3-6 month upside case tied to continued advanced packaging qualification and foundry share gains.
• Consider a call spread in ONTO into the print (e.g., 1-2 month tenor) to express upside from a beat-and-raise while limiting downside from valuation compression; best suited if implied vol remains below the stock's historical earnings move.
• Pair trade: long ONTO / short a basket of slower-growth semiconductor equipment names that are more exposed to generic capex cycles; the thesis is that packaging/metrology names should retain premium multiples even if broader semi equipment orders wobble over the next 2 quarters.
• If you already own TSM, avoid adding aggressively on the ONTO news alone; treat ONTO as a higher-beta proxy for TSM packaging intensity, with the better entry point likely after customer capex commentary clarifies the second-half demand curve.